Pathogens and Public Swimming Pools

Swimming pools are increasingly recognised as an important transmission route of cryptosporidiosis. Swimmers are infected through ingestion of waterborne faecal matter. The infective oocycts resulting from one Accidental Faecal Release (AFR) may be prolific. A swimmer swallowing just 10 ml of water would ingest an average of 200 oocysts, which is well above the dose capable of causing infection.